87 lines
1.9 KiB
Rust
87 lines
1.9 KiB
Rust
use std::{sync::{mpsc, Arc, Mutex}, thread};
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pub mod leb128;
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pub mod status;
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pub mod http;
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pub use status::MinecraftStatus;
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pub struct ThreadPool {
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workers: Vec<ThreadWorker>,
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sender: Option<mpsc::Sender<Job>>,
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}
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type Job = Box<dyn FnOnce() + Send + 'static>;
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impl ThreadPool {
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// Create a new ThreadPool with `size` available threads.
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//
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// # Panics
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//
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// `new` will panic if `size` is zero.
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pub fn new(size: usize) -> ThreadPool {
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assert!(size > 0);
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let (sender, receiver) = mpsc::channel();
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let receiver = Arc::new(Mutex::new(receiver));
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let mut workers = Vec::with_capacity(size);
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for id in 0..size {
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workers.push(ThreadWorker::new(id, Arc::clone(&receiver)));
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}
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ThreadPool {
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workers,
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sender: Some(sender)
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}
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}
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pub fn execute<F>(&self, f: F)
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where
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F: FnOnce() + Send + 'static
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{
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let job = Box::new(f);
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self.sender.as_ref().unwrap().send(job).unwrap();
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}
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}
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impl Drop for ThreadPool {
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fn drop(&mut self) {
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drop(self.sender.take());
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for worker in &mut self.workers.drain(..) {
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println!("Shutting down worker {}", worker.id);
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worker.thread.join().unwrap();
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}
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}
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}
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struct ThreadWorker {
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id: usize,
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thread: thread::JoinHandle<()>,
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}
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impl ThreadWorker {
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fn new(id: usize, receiver: Arc<Mutex<mpsc::Receiver<Job>>>) -> ThreadWorker {
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let thread = thread::spawn(move || loop {
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let msg = receiver.lock().unwrap().recv();
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match msg {
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Ok(job) => {
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// println!("Job received by worker {id}");
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job();
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}
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Err(_) => {
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// println!("Worker {id} disconnected. Shutting down...");
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break;
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}
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}
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});
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ThreadWorker { id, thread }
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}
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}
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